Actual source code: xops.c

  1: /*
  2:     Defines the operations for the X PetscDraw implementation.
  3: */

  5: #include <../src/sys/classes/draw/impls/x/ximpl.h>

  7: /*
  8:      These macros transform from the users coordinates to the  X-window pixel coordinates.
  9: */
 10: #define XTRANS(draw,xwin,x)  ((int)(((xwin)->w-1)*((draw)->port_xl + (((x - (draw)->coor_xl)*((draw)->port_xr - (draw)->port_xl))/((draw)->coor_xr - (draw)->coor_xl)))))
 11: #define YTRANS(draw,xwin,y)  (((xwin)->h-1) - (int)(((xwin)->h-1)*((draw)->port_yl + (((y - (draw)->coor_yl)*((draw)->port_yr - (draw)->port_yl))/((draw)->coor_yr - (draw)->coor_yl)))))

 13: #define ITRANS(draw,xwin,i)  ((draw)->coor_xl + (((PetscReal)(i))*((draw)->coor_xr - (draw)->coor_xl)/((xwin)->w-1) - (draw)->port_xl)/((draw)->port_xr - (draw)->port_xl))
 14: #define JTRANS(draw,xwin,j)  ((draw)->coor_yl + (((PetscReal)(j))/((xwin)->h-1) + (draw)->port_yl - 1)*((draw)->coor_yr - (draw)->coor_yl)/((draw)->port_yl - (draw)->port_yr))

 16: static PetscErrorCode PetscDrawSetViewport_X(PetscDraw draw,PetscReal xl,PetscReal yl,PetscReal xr,PetscReal yr)
 17: {
 18:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;
 19:   int            xa,ya,xb,yb,xmax = XiWin->w-1,ymax = XiWin->h-1;
 20:   XRectangle     box;

 24:   xa = (int)(xl*xmax); ya = ymax - (int)(yr*ymax);
 25:   xb = (int)(xr*xmax); yb = ymax - (int)(yl*ymax);
 26:   PetscDrawCollectiveBegin(draw);
 27:   box.x = (short)xa; box.width  = (unsigned short)(xb + 1 - xa);
 28:   box.y = (short)ya; box.height = (unsigned short)(yb + 1 - ya);
 29:   XSetClipRectangles(XiWin->disp,XiWin->gc.set,0,0,&box,1,Unsorted);
 30:   PetscDrawCollectiveEnd(draw);
 31:   return(0);
 32: }

 34: static PetscErrorCode PetscDrawCoordinateToPixel_X(PetscDraw draw,PetscReal x,PetscReal y,int *i,int *j)
 35: {
 36:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;

 39:   *i = XTRANS(draw,XiWin,x);
 40:   *j = YTRANS(draw,XiWin,y);
 41:   return(0);
 42: }

 44: static PetscErrorCode PetscDrawPixelToCoordinate_X(PetscDraw draw,int i,int j,PetscReal *x,PetscReal *y)
 45: {
 46:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;

 49:   *x = ITRANS(draw,XiWin,i);
 50:   *y = JTRANS(draw,XiWin,j);
 51:   return(0);
 52: }

 54: static PetscErrorCode PetscDrawPoint_X(PetscDraw draw,PetscReal x,PetscReal y,int c)
 55: {
 56:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;
 57:   int         xx,yy,i,j;

 60:   xx = XTRANS(draw,XiWin,x);
 61:   yy = YTRANS(draw,XiWin,y);
 62:   PetscDrawXiSetColor(XiWin,c);
 63:   for (i=-1; i<2; i++) {
 64:     for (j=-1; j<2; j++) {
 65:       XDrawPoint(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,xx+i,yy+j);
 66:     }
 67:   }
 68:   return(0);
 69: }

 71: static PetscErrorCode PetscDrawPointPixel_X(PetscDraw draw,int x,int y,int c)
 72: {
 73:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;

 76:   PetscDrawXiSetColor(XiWin,c);
 77:   XDrawPoint(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x,y);
 78:   return(0);
 79: }

 81: static PetscErrorCode PetscDrawLine_X(PetscDraw draw,PetscReal xl,PetscReal yl,PetscReal xr,PetscReal yr,int cl)
 82: {
 83:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;
 84:   int         x_1,y_1,x_2,y_2;

 87:   PetscDrawXiSetColor(XiWin,cl);
 88:   x_1 = XTRANS(draw,XiWin,xl); x_2  = XTRANS(draw,XiWin,xr);
 89:   y_1 = YTRANS(draw,XiWin,yl); y_2  = YTRANS(draw,XiWin,yr);
 90:   XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_1,y_1,x_2,y_2);
 91:   return(0);
 92: }

 94: static PetscErrorCode PetscDrawArrow_X(PetscDraw draw,PetscReal xl,PetscReal yl,PetscReal xr,PetscReal yr,int cl)
 95: {
 96:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;
 97:   int         x_1,y_1,x_2,y_2;

100:   PetscDrawXiSetColor(XiWin,cl);
101:   x_1 = XTRANS(draw,XiWin,xl); x_2 = XTRANS(draw,XiWin,xr);
102:   y_1 = YTRANS(draw,XiWin,yl); y_2 = YTRANS(draw,XiWin,yr);
103:   XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_1,y_1,x_2,y_2);
104:   if (x_1 == x_2 && y_1 == y_2) return(0);
105:   if (x_1 == x_2 && PetscAbs(y_1 - y_2) > 7) {
106:     if (y_2 > y_1) {
107:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2,y_2,x_2-3,y_2-3);
108:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2,y_2,x_2+3,y_2-3);
109:     } else {
110:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2,y_2,x_2-3,y_2+3);
111:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2,y_2,x_2+3,y_2+3);
112:     }
113:   }
114:   if (y_1 == y_2 && PetscAbs(x_1 - x_2) > 7) {
115:     if (x_2 > x_1) {
116:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2-3,y_2-3,x_2,y_2);
117:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2-3,y_2+3,x_2,y_2);
118:     } else {
119:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2,y_2,x_2+3,y_2-3);
120:       XDrawLine(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x_2,y_2,x_2+3,y_2+3);
121:     }
122:   }
123:   return(0);
124: }

126: static PetscErrorCode PetscDrawRectangle_X(PetscDraw draw,PetscReal xl,PetscReal yl,PetscReal xr,PetscReal yr,int c1,int c2,int c3,int c4)
127: {
128:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;
129:   int         x,y,w,h,c = (c1 + c2 + c3 + c4)/4;

132:   PetscDrawXiSetColor(XiWin,c);
133:   x = XTRANS(draw,XiWin,xl); w = XTRANS(draw,XiWin,xr) + 1 - x; if (w <= 0) w = 1;
134:   y = YTRANS(draw,XiWin,yr); h = YTRANS(draw,XiWin,yl) + 1 - y; if (h <= 0) h = 1;
135:   XFillRectangle(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,x,y,w,h);
136:   return(0);
137: }

139: static PetscErrorCode PetscDrawEllipse_X(PetscDraw draw,PetscReal x,PetscReal y,PetscReal a,PetscReal b,int c)
140: {
141:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;
142:   int         xA,yA,w,h;

145:   PetscDrawXiSetColor(XiWin, c);
146:   xA = XTRANS(draw,XiWin, x - a/2); w = XTRANS(draw,XiWin, x + a/2) + 1 - xA; w = PetscAbs(w);
147:   yA = YTRANS(draw,XiWin, y + b/2); h = YTRANS(draw,XiWin, y - b/2) + 1 - yA; h = PetscAbs(h);
148:   XFillArc(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,xA,yA,w,h,0,360*64);
149:   return(0);
150: }

152: PETSC_INTERN PetscErrorCode PetscDrawInterpolatedTriangle_X(PetscDraw_X*,int,int,int,int,int,int,int,int,int);

154: static PetscErrorCode PetscDrawTriangle_X(PetscDraw draw,PetscReal X1,PetscReal Y_1,PetscReal X2,PetscReal Y2,PetscReal X3,PetscReal Y3,int c1,int c2,int c3)
155: {
156:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;

160:   if (c1 == c2 && c2 == c3) {
161:     XPoint pt[3];
162:     PetscDrawXiSetColor(XiWin,c1);
163:     pt[0].x = XTRANS(draw,XiWin,X1);
164:     pt[0].y = YTRANS(draw,XiWin,Y_1);
165:     pt[1].x = XTRANS(draw,XiWin,X2);
166:     pt[1].y = YTRANS(draw,XiWin,Y2);
167:     pt[2].x = XTRANS(draw,XiWin,X3);
168:     pt[2].y = YTRANS(draw,XiWin,Y3);
169:     XFillPolygon(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,pt,3,Convex,CoordModeOrigin);
170:   } else {
171:     int x1,y_1,x2,y2,x3,y3;
172:     x1   = XTRANS(draw,XiWin,X1);
173:     y_1  = YTRANS(draw,XiWin,Y_1);
174:     x2   = XTRANS(draw,XiWin,X2);
175:     y2   = YTRANS(draw,XiWin,Y2);
176:     x3   = XTRANS(draw,XiWin,X3);
177:     y3   = YTRANS(draw,XiWin,Y3);
178:     PetscDrawInterpolatedTriangle_X(XiWin,x1,y_1,c1,x2,y2,c2,x3,y3,c3);
179:   }
180:   return(0);
181: }

183: static PetscErrorCode PetscDrawStringSetSize_X(PetscDraw draw,PetscReal x,PetscReal y)
184: {
185:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;
186:   int            w,h;

190:   w    = (int)((XiWin->w)*x*(draw->port_xr - draw->port_xl)/(draw->coor_xr - draw->coor_xl));
191:   h    = (int)((XiWin->h)*y*(draw->port_yr - draw->port_yl)/(draw->coor_yr - draw->coor_yl));
192:   PetscFree(XiWin->font);
193:   PetscDrawXiFontFixed(XiWin,w,h,&XiWin->font);
194:   return(0);
195: }

197: static PetscErrorCode PetscDrawStringGetSize_X(PetscDraw draw,PetscReal *x,PetscReal  *y)
198: {
199:   PetscDraw_X *XiWin = (PetscDraw_X*)draw->data;
200:   PetscReal   w,h;

203:   w = XiWin->font->font_w; h = XiWin->font->font_h;
204:   if (x) *x = w*(draw->coor_xr - draw->coor_xl)/((XiWin->w)*(draw->port_xr - draw->port_xl));
205:   if (y) *y = h*(draw->coor_yr - draw->coor_yl)/((XiWin->h)*(draw->port_yr - draw->port_yl));
206:   return(0);
207: }

209: static PetscErrorCode PetscDrawString_X(PetscDraw draw,PetscReal x,PetscReal y,int c,const char chrs[])
210: {
211:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;
212:   int            xx,yy,descent = XiWin->font->font_descent;
213:   size_t         len;
214:   char           *substr;
215:   PetscToken     token;

219:   xx = XTRANS(draw,XiWin,x);
220:   yy = YTRANS(draw,XiWin,y);
221:   PetscDrawXiSetColor(XiWin,c);

223:   PetscTokenCreate(chrs,'\n',&token);
224:   PetscTokenFind(token,&substr);
225:   while (substr) {
226:     PetscStrlen(substr,&len);
227:     XDrawString(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,xx,yy-descent,substr,len);
228:     yy  += XiWin->font->font_h;
229:     PetscTokenFind(token,&substr);
230:   }
231:   PetscTokenDestroy(&token);
232:   return(0);
233: }

235: static PetscErrorCode PetscDrawStringVertical_X(PetscDraw draw,PetscReal x,PetscReal y,int c,const char text[])
236: {
237:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;
238:   int            xx,yy,offset = XiWin->font->font_h - XiWin->font->font_descent;
239:   char           chr[2] = {0, 0};

242:   xx = XTRANS(draw,XiWin,x);
243:   yy = YTRANS(draw,XiWin,y);
244:   PetscDrawXiSetColor(XiWin,c);
245:   while ((chr[0] = *text++)) {
246:     XDrawString(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,xx,yy+offset,chr,1);
247:     yy += XiWin->font->font_h;
248:   }
249:   return(0);
250: }

252: static PetscErrorCode PetscDrawFlush_X(PetscDraw draw)
253: {
254:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;
255:   PetscMPIInt    rank;

259:   /* make sure the X server processed requests from all processes */
260:   PetscDrawCollectiveBegin(draw);
261:   XSync(XiWin->disp,False);
262:   PetscDrawCollectiveEnd(draw);
263:   MPI_Barrier(PetscObjectComm((PetscObject)draw));

265:   /* transfer pixmap contents to window (only the first process does this) */
266:   if (XiWin->drw && XiWin->win) {
267:     MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);
268:     PetscDrawCollectiveBegin(draw);
269:     if (!rank) XCopyArea(XiWin->disp,XiWin->drw,XiWin->win,XiWin->gc.set,0,0,XiWin->w,XiWin->h,0,0);
270:     if (!rank) XSync(XiWin->disp,False);
271:     PetscDrawCollectiveEnd(draw);
272:     MPI_Barrier(PetscObjectComm((PetscObject)draw));
273:   }
274:   return(0);
275: }

277: static PetscErrorCode PetscDrawClear_X(PetscDraw draw)
278: {
279:   PetscDraw_X    *XiWin = (PetscDraw_X*)draw->data;
280:   int            xmax = XiWin->w-1,  ymax = XiWin->h-1;
281:   PetscReal      xl = draw->port_xl, yl = draw->port_yl;
282:   PetscReal      xr = draw->port_xr, yr = draw->port_yr;
283:   PetscMPIInt    rank;

287:   /* make sure the X server processed requests from all processes */
288:   PetscDrawCollectiveBegin(draw);
289:   XSync(XiWin->disp,False);
290:   PetscDrawCollectiveEnd(draw);
291:   MPI_Barrier(PetscObjectComm((PetscObject)draw));

293:   /* only the first process handles the clearing business */
294:   PetscDrawCollectiveBegin(draw);
295:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);
296:   if (!rank) {
297:     int xa = (int)(xl*xmax), ya = ymax - (int)(yr*ymax);
298:     int xb = (int)(xr*xmax), yb = ymax - (int)(yl*ymax);
299:     unsigned int w = (unsigned int)(xb + 1 - xa);
300:     unsigned int h = (unsigned int)(yb + 1 - ya);
301:     PetscDrawXiSetPixVal(XiWin,XiWin->background);
302:     XFillRectangle(XiWin->disp,PetscDrawXiDrawable(XiWin),XiWin->gc.set,xa,ya,w,h);
303:     XSync(XiWin->disp,False);
304:   }
305:   PetscDrawCollectiveEnd(draw);
306:   MPI_Barrier(PetscObjectComm((PetscObject)draw));
307:   return(0);
308: }

310: static PetscErrorCode PetscDrawSetDoubleBuffer_X(PetscDraw draw)
311: {
312:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;
313:   PetscMPIInt    rank;

317:   if (win->drw) return(0);
318:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);

320:   PetscDrawCollectiveBegin(draw);
321:   if (!rank) {PetscDrawXiQuickPixmap(win);}
322:   PetscDrawCollectiveEnd(draw);
323:   MPI_Bcast(&win->drw,1,MPI_UNSIGNED_LONG,0,PetscObjectComm((PetscObject)draw));
324:   return(0);
325: }

327: static PetscErrorCode PetscDrawGetPopup_X(PetscDraw draw,PetscDraw *popup)
328: {
329:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;
330:   PetscBool      flg  = PETSC_TRUE;

334:   PetscOptionsGetBool(((PetscObject)draw)->options,((PetscObject)draw)->prefix,"-draw_popup",&flg,NULL);
335:   if (!flg || !win->win) {*popup = NULL; return(0);}

337:   PetscDrawCreate(PetscObjectComm((PetscObject)draw),draw->display,NULL,win->x,win->y+win->h+10,220,220,popup);
338:   PetscObjectSetOptionsPrefix((PetscObject)*popup,"popup_");
339:   PetscObjectAppendOptionsPrefix((PetscObject)*popup,((PetscObject)draw)->prefix);
340:   PetscDrawSetType(*popup,PETSC_DRAW_X);
341:   draw->popup = *popup;
342:   return(0);
343: }

345: static PetscErrorCode PetscDrawSetTitle_X(PetscDraw draw,const char title[])
346: {
347:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;
348:   PetscMPIInt    rank;

352:   if (!win->win) return(0);
353:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);
354:   PetscDrawCollectiveBegin(draw);
355:   if (!rank) {
356:     size_t        len;
357:     XTextProperty prop;
358:     PetscStrlen(title,&len);
359:     XGetWMName(win->disp,win->win,&prop);
360:     XFree((void*)prop.value);
361:     prop.value  = (unsigned char*)title;
362:     prop.nitems = (long)len;
363:     XSetWMName(win->disp,win->win,&prop);
364:   }
365:   PetscDrawCollectiveEnd(draw);
366:   return(0);
367: }

369: static PetscErrorCode PetscDrawCheckResizedWindow_X(PetscDraw draw)
370: {
371:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;
372:   int            xywh[4];
373:   PetscMPIInt    rank;

377:   if (!win->win) return(0);
378:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);

380:   PetscDrawCollectiveBegin(draw);
381:   if (!rank) {PetscDrawXiGetGeometry(win,xywh,xywh+1,xywh+2,xywh+3);}
382:   PetscDrawCollectiveEnd(draw);
383:   MPI_Bcast(xywh,4,MPI_INT,0,PetscObjectComm((PetscObject)draw));

385:   /* record new window position */
386:   draw->x = win->x = xywh[0];
387:   draw->y = win->y = xywh[1];
388:   if (xywh[2] == win->w && xywh[3] == win->h) return(0);
389:   /* record new window sizes */
390:   draw->w = win->w = xywh[2];
391:   draw->h = win->h = xywh[3];

393:   /* recreate pixmap (only first processor does this) */
394:   PetscDrawCollectiveBegin(draw);
395:   if (!rank && win->drw) {PetscDrawXiQuickPixmap(win);}
396:   PetscDrawCollectiveEnd(draw);
397:   MPI_Bcast(&win->drw,1,MPI_UNSIGNED_LONG,0,PetscObjectComm((PetscObject)draw));
398:   /* reset the clipping */
399:   PetscDrawSetViewport_X(draw,draw->port_xl,draw->port_yl,draw->port_xr,draw->port_yr);
400:   return(0);
401: }

403: static PetscErrorCode PetscDrawResizeWindow_X(PetscDraw draw,int w,int h)
404: {
405:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;
406:   PetscMPIInt    rank;

410:   if (w == win->w && h == win->h) return(0);
411:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);

413:   if (win->win) {
414:     PetscDrawCollectiveBegin(draw);
415:     if (!rank) {PetscDrawXiResizeWindow(win,w,h);}
416:     PetscDrawCollectiveEnd(draw);
417:     PetscDrawCheckResizedWindow_X(draw);
418:   } else if (win->drw) {
419:     draw->w = win->w = w; draw->h = win->h = h;
420:     /* recreate pixmap (only first processor does this) */
421:     PetscDrawCollectiveBegin(draw);
422:     if (!rank) {PetscDrawXiQuickPixmap(win);}
423:     MPI_Bcast(&win->drw,1,MPI_UNSIGNED_LONG,0,PetscObjectComm((PetscObject)draw));
424:     /* reset the clipping */
425:     PetscDrawCollectiveEnd(draw);
426:     PetscDrawSetViewport_X(draw,draw->port_xl,draw->port_yl,draw->port_xr,draw->port_yr);
427:   }
428:   return(0);
429: }

431: #include <X11/cursorfont.h>

433: static PetscErrorCode PetscDrawGetMouseButton_X(PetscDraw draw,PetscDrawButton *button,PetscReal *x_user,PetscReal *y_user,PetscReal *x_phys,PetscReal *y_phys)
434: {
435:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;
436:   Cursor         cursor;
437:   XEvent         report;
438:   Window         root,child;
439:   int            root_x,root_y,px=0,py=0;
440:   unsigned int   w,h,border,depth;
441:   unsigned int   keys_button;
442:   PetscMPIInt    rank;
443:   PetscReal      xx,yy;

447:   *button = PETSC_BUTTON_NONE;
448:   if (!win->win) return(0);
449:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);

451:   PetscDrawCollectiveBegin(draw);
452:   if (rank) goto finally;

454:   /* change cursor to indicate input */
455:   cursor = XCreateFontCursor(win->disp,XC_hand2); if (!cursor) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_LIB,"Unable to create X cursor");
456:   XDefineCursor(win->disp,win->win,cursor);
457:   /* wait for mouse button events */
458:   XSelectInput(win->disp,win->win,ButtonPressMask|ButtonReleaseMask);
459:   while (XCheckTypedEvent(win->disp,ButtonPress,&report));
460:   XMaskEvent(win->disp,ButtonReleaseMask,&report);
461:   /* get mouse pointer coordinates */
462:   XQueryPointer(win->disp,report.xmotion.window,&root,&child,&root_x,&root_y,&px,&py,&keys_button);
463:   /* the user may resize the window before pressing the mouse button */
464:   XGetGeometry(win->disp,win->win,&root,&root_x,&root_y,&w,&h,&border,&depth);
465:   /* cleanup input event handler and cursor  */
466:   XSelectInput(win->disp,win->win,NoEventMask);
467:   XUndefineCursor(win->disp,win->win);
468:   XFreeCursor(win->disp, cursor);
469:   XSync(win->disp,False);

471:   switch (report.xbutton.button) {
472:   case Button1: *button = PETSC_BUTTON_LEFT; break;
473:   case Button2: *button = PETSC_BUTTON_CENTER; break;
474:   case Button3: *button = PETSC_BUTTON_RIGHT; break;
475:   case Button4: *button = PETSC_BUTTON_WHEEL_UP; break;
476:   case Button5: *button = PETSC_BUTTON_WHEEL_DOWN; break;
477:   }
478:   if (report.xbutton.state & ShiftMask) {
479:     switch (report.xbutton.button) {
480:     case Button1: *button = PETSC_BUTTON_LEFT_SHIFT; break;
481:     case Button2: *button = PETSC_BUTTON_CENTER_SHIFT; break;
482:     case Button3: *button = PETSC_BUTTON_RIGHT_SHIFT; break;
483:     }
484:   }
485:   xx = ((PetscReal)px)/w;
486:   yy = 1 - ((PetscReal)py)/h;
487:   if (x_user) *x_user = draw->coor_xl + (xx - draw->port_xl)*(draw->coor_xr - draw->coor_xl)/(draw->port_xr - draw->port_xl);
488:   if (y_user) *y_user = draw->coor_yl + (yy - draw->port_yl)*(draw->coor_yr - draw->coor_yl)/(draw->port_yr - draw->port_yl);
489:   if (x_phys) *x_phys = xx;
490:   if (y_phys) *y_phys = yy;

492: finally:
493:   PetscDrawCollectiveEnd(draw);
494:   PetscDrawCheckResizedWindow_X(draw);
495:   return(0);
496: }

498: static PetscErrorCode PetscDrawPause_X(PetscDraw draw)
499: {
500:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;

504:   if (!win->win) return(0);
505:   if (draw->pause > 0) PetscSleep(draw->pause);
506:   else if (draw->pause == -1) {
507:     PetscDrawButton button = PETSC_BUTTON_NONE;
508:     PetscDrawGetMouseButton(draw,&button,NULL,NULL,NULL,NULL);
509:     if (button == PETSC_BUTTON_CENTER) draw->pause = 0;
510:   }
511:   return(0);
512: }

514: static PetscErrorCode PetscDrawDestroy_X(PetscDraw draw)
515: {
516:   PetscDraw_X    *win = (PetscDraw_X*)draw->data;

520:   PetscDrawDestroy(&draw->popup);
521:   PetscDrawXiClose(win);
522:   PetscFree(draw->data);
523:   return(0);
524: }

526: static       PetscErrorCode PetscDrawGetSingleton_X(PetscDraw,PetscDraw*);
527: static       PetscErrorCode PetscDrawRestoreSingleton_X(PetscDraw,PetscDraw*);
528: PETSC_INTERN PetscErrorCode PetscDrawGetImage_X(PetscDraw,unsigned char[][3],unsigned int*,unsigned int*,unsigned char*[]);

530: static struct _PetscDrawOps DvOps = { PetscDrawSetDoubleBuffer_X,
531:                                       PetscDrawFlush_X,
532:                                       PetscDrawLine_X,
533:                                       NULL,
534:                                       NULL,
535:                                       PetscDrawPoint_X,
536:                                       NULL,
537:                                       PetscDrawString_X,
538:                                       PetscDrawStringVertical_X,
539:                                       PetscDrawStringSetSize_X,
540:                                       PetscDrawStringGetSize_X,
541:                                       PetscDrawSetViewport_X,
542:                                       PetscDrawClear_X,
543:                                       PetscDrawRectangle_X,
544:                                       PetscDrawTriangle_X,
545:                                       PetscDrawEllipse_X,
546:                                       PetscDrawGetMouseButton_X,
547:                                       PetscDrawPause_X,
548:                                       NULL,
549:                                       NULL,
550:                                       PetscDrawGetPopup_X,
551:                                       PetscDrawSetTitle_X,
552:                                       PetscDrawCheckResizedWindow_X,
553:                                       PetscDrawResizeWindow_X,
554:                                       PetscDrawDestroy_X,
555:                                       NULL,
556:                                       PetscDrawGetSingleton_X,
557:                                       PetscDrawRestoreSingleton_X,
558:                                       NULL,
559:                                       PetscDrawGetImage_X,
560:                                       NULL,
561:                                       PetscDrawArrow_X,
562:                                       PetscDrawCoordinateToPixel_X,
563:                                       PetscDrawPixelToCoordinate_X,
564:                                       PetscDrawPointPixel_X,
565:                                       NULL};

567: static PetscErrorCode PetscDrawGetSingleton_X(PetscDraw draw,PetscDraw *sdraw)
568: {
569:   PetscDraw_X    *Xwin = (PetscDraw_X*)draw->data,*sXwin;

573:   PetscDrawCreate(PETSC_COMM_SELF,draw->display,draw->title,draw->x,draw->y,draw->w,draw->h,sdraw);
574:   PetscObjectChangeTypeName((PetscObject)*sdraw,PETSC_DRAW_X);
575:   PetscMemcpy((*sdraw)->ops,&DvOps,sizeof(DvOps));

577:   if (draw->popup) {
578:     PetscDrawGetSingleton(draw->popup,&(*sdraw)->popup);
579:   }
580:   (*sdraw)->pause   = draw->pause;
581:   (*sdraw)->coor_xl = draw->coor_xl;
582:   (*sdraw)->coor_xr = draw->coor_xr;
583:   (*sdraw)->coor_yl = draw->coor_yl;
584:   (*sdraw)->coor_yr = draw->coor_yr;
585:   (*sdraw)->port_xl = draw->port_xl;
586:   (*sdraw)->port_xr = draw->port_xr;
587:   (*sdraw)->port_yl = draw->port_yl;
588:   (*sdraw)->port_yr = draw->port_yr;

590:   /* share drawables (windows and/or pixmap) from the parent draw */
591:   PetscNewLog(*sdraw,&sXwin);
592:   (*sdraw)->data = (void*)sXwin;
593:   PetscDrawXiInit(sXwin,draw->display);
594:   if (Xwin->win) {
595:     PetscDrawXiQuickWindowFromWindow(sXwin,Xwin->win);
596:     sXwin->drw = Xwin->drw; /* XXX If the window is ever resized, this is wrong! */
597:   } else if (Xwin->drw) {
598:     PetscDrawXiColormap(sXwin);
599:     sXwin->drw = Xwin->drw;
600:   }
601:   PetscDrawXiGetGeometry(sXwin,&sXwin->x,&sXwin->y,&sXwin->w,&sXwin->h);
602:   (*sdraw)->x = sXwin->x; (*sdraw)->y = sXwin->y;
603:   (*sdraw)->w = sXwin->w; (*sdraw)->h = sXwin->h;
604:   return(0);
605: }

607: static PetscErrorCode PetscDrawRestoreSingleton_X(PetscDraw draw,PetscDraw *sdraw)
608: {

612:   if (draw->popup && (*sdraw)->popup) {
613:     PetscBool isdrawx;
614:     PetscDraw_X *pXwin = (PetscDraw_X*)draw->popup->data;
615:     PetscDraw_X *sXwin = (PetscDraw_X*)(*sdraw)->popup->data;
616:     PetscObjectTypeCompare((PetscObject)draw->popup,PETSC_DRAW_X,&isdrawx);
617:     if (!isdrawx) goto finally;
618:     PetscObjectTypeCompare((PetscObject)(*sdraw)->popup,PETSC_DRAW_X,&isdrawx);
619:     if (!isdrawx) goto finally;
620:     if (sXwin->win == pXwin->win) {
621:       PetscDrawRestoreSingleton(draw->popup,&(*sdraw)->popup);
622:     }
623:   }
624: finally:
625:   PetscDrawDestroy(sdraw);
626:   return(0);
627: }

629: static PetscErrorCode PetscDrawXGetDisplaySize_Private(const char name[],int *width,int *height,PetscBool *has_display)
630: {
631:   Display *display;

634:   display = XOpenDisplay(name);
635:   if (!display) {
636:     *width  = *height = 0;
637:     (*PetscErrorPrintf)("Unable to open display on %s\n\
638:     Make sure your COMPUTE NODES are authorized to connect\n\
639:     to this X server and either your DISPLAY variable\n\
640:     is set or you use the -display name option\n",name);
641:     *has_display = PETSC_FALSE;
642:     return(0);
643:   }
644:   *has_display = PETSC_TRUE;
645:   *width  = (int)DisplayWidth(display,DefaultScreen(display));
646:   *height = (int)DisplayHeight(display,DefaultScreen(display));
647:   XCloseDisplay(display);
648:   return(0);
649: }

651: /*MC
652:      PETSC_DRAW_X  - PETSc graphics device that uses either X windows or its virtual version Xvfb

654:    Options Database Keys:
655: +  -display <display> - sets the display to use
656: .  -x_virtual - forces use of a X virtual display Xvfb that will not display anything but -draw_save will still work.
657:                 Xvfb is automatically started up in PetscSetDisplay() with this option
658: .  -draw_size w,h - percentage of screen (either 1, .5, .3, .25), or size in pixels
659: .  -geometry x,y,w,h - set location and size in pixels
660: .  -draw_virtual - do not open a window (draw on a pixmap), -draw_save will still work
661: -  -draw_double_buffer - avoid window flickering (draw on pixmap and flush to window)

663:    Level: beginner

665: .seealso:  PetscDrawOpenX(), PetscDrawSetDisplay(), PetscDrawSetFromOptions()

667: M*/

669: PETSC_EXTERN PetscErrorCode PetscDrawCreate_X(PetscDraw draw)
670: {
671:   PetscDraw_X    *Xwin;
673:   PetscMPIInt    rank;
674:   int            x = draw->x,y = draw->y,w = draw->w,h = draw->h;
675:   static int     xavailable = 0,yavailable = 0,ybottom = 0,xmax = 0,ymax = 0;
676:   PetscBool      set,dvirtual = PETSC_FALSE,doublebuffer = PETSC_TRUE,has_display;
677:   PetscInt       xywh[4],osize = 4,nsizes=2;
678:   PetscReal      sizes[2] = {.3,.3};
679:   static size_t  DISPLAY_LENGTH = 265;

682:   /* get the display variable */
683:   if (!draw->display) {
684:     PetscMalloc1(DISPLAY_LENGTH,&draw->display);
685:     PetscGetDisplay(draw->display,DISPLAY_LENGTH);
686:   }

688:   /* initialize the display size */
689:   if (!xmax) {
690:     PetscDrawXGetDisplaySize_Private(draw->display,&xmax,&ymax,&has_display);
691:     /* if some processors fail on this and others succed then this is a problem ! */
692:     if (!has_display) {
693:       (*PetscErrorPrintf)("PETSc unable to use X windows\nproceeding without graphics\n");
694:       PetscDrawSetType(draw,PETSC_DRAW_NULL);
695:       return(0);
696:     }
697:   }

699:   /* allow user to set size of drawable */
700:   PetscOptionsGetRealArray(((PetscObject)draw)->options,((PetscObject)draw)->prefix,"-draw_size",sizes,&nsizes,&set);
701:   if (set && nsizes == 1 && sizes[0] > 1.0) sizes[1] = sizes[0];
702:   if (set) {
703:     if (sizes[0] > 1.0)       w = (int)sizes[0];
704:     else if (sizes[0] == 1.0) w = PETSC_DRAW_FULL_SIZE;
705:     else if (sizes[0] == .5)  w = PETSC_DRAW_HALF_SIZE;
706:     else if (sizes[0] == .3)  w = PETSC_DRAW_THIRD_SIZE;
707:     else if (sizes[0] == .25) w = PETSC_DRAW_QUARTER_SIZE;
708:     if (sizes[1] > 1.0)       h = (int)sizes[1];
709:     else if (sizes[1] == 1.0) h = PETSC_DRAW_FULL_SIZE;
710:     else if (sizes[1] == .5)  h = PETSC_DRAW_HALF_SIZE;
711:     else if (sizes[1] == .3)  h = PETSC_DRAW_THIRD_SIZE;
712:     else if (sizes[1] == .25) h = PETSC_DRAW_QUARTER_SIZE;
713:   }
714:   if (w == PETSC_DECIDE || w == PETSC_DEFAULT) w = draw->w = 300;
715:   if (h == PETSC_DECIDE || h == PETSC_DEFAULT) h = draw->h = 300;
716:   switch (w) {
717:   case PETSC_DRAW_FULL_SIZE:    w = draw->w = (xmax - 10);   break;
718:   case PETSC_DRAW_HALF_SIZE:    w = draw->w = (xmax - 20)/2; break;
719:   case PETSC_DRAW_THIRD_SIZE:   w = draw->w = (xmax - 30)/3; break;
720:   case PETSC_DRAW_QUARTER_SIZE: w = draw->w = (xmax - 40)/4; break;
721:   }
722:   switch (h) {
723:   case PETSC_DRAW_FULL_SIZE:    h = draw->h = (ymax - 10);   break;
724:   case PETSC_DRAW_HALF_SIZE:    h = draw->h = (ymax - 20)/2; break;
725:   case PETSC_DRAW_THIRD_SIZE:   h = draw->h = (ymax - 30)/3; break;
726:   case PETSC_DRAW_QUARTER_SIZE: h = draw->h = (ymax - 40)/4; break;
727:   }

729:   PetscOptionsGetBool(((PetscObject)draw)->options,((PetscObject)draw)->prefix,"-draw_virtual",&dvirtual,NULL);

731:   if (!dvirtual) {

733:     /* allow user to set location and size of window */
734:     xywh[0] = x; xywh[1] = y; xywh[2] = w; xywh[3] = h;
735:     PetscOptionsGetIntArray(((PetscObject)draw)->options,((PetscObject)draw)->prefix,"-geometry",xywh,&osize,NULL);
736:     x = (int)xywh[0]; y = (int)xywh[1]; w = (int)xywh[2]; h = (int)xywh[3];
737:     if (w == PETSC_DECIDE || w == PETSC_DEFAULT) w = 300;
738:     if (h == PETSC_DECIDE || h == PETSC_DEFAULT) h = 300;
739:     draw->x = x; draw->y = y; draw->w = w; draw->h = h;

741:     if (draw->x == PETSC_DECIDE || draw->y == PETSC_DECIDE) {
742:       /*
743:        PETSc tries to place windows starting in the upper left corner
744:         and moving across to the right.

746:        +0,0-------------------------------------------+
747:        |  Region used so far  +xavailable,yavailable  |
748:        |                      |                       |
749:        |                      |                       |
750:        +--------------------- +ybottom                |
751:        |                                              |
752:        |                                              |
753:        +----------------------------------------------+xmax,ymax

755:       */
756:       /*  First: can we add it to the right? */
757:       if (xavailable + w + 10 <= xmax) {
758:         x       = xavailable;
759:         y       = yavailable;
760:         ybottom = PetscMax(ybottom,y + h + 30);
761:       } else {
762:         /* No, so add it below on the left */
763:         xavailable = x = 0;
764:         yavailable = y = ybottom;
765:         ybottom    = ybottom + h + 30;
766:       }
767:     }
768:     /* update available region */
769:     xavailable = PetscMax(xavailable,x + w + 10);
770:     if (xavailable >= xmax) {
771:       xavailable = 0;
772:       yavailable = yavailable + h + 30;
773:       ybottom    = yavailable;
774:     }
775:     if (yavailable >= ymax) {
776:       y          = 0;
777:       yavailable = 0;
778:       ybottom    = 0;
779:     }

781:   } /* endif (!dvirtual) */

783:   MPI_Comm_rank(PetscObjectComm((PetscObject)draw),&rank);
784:   if (!rank && (w <= 0 || h <= 0)) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"Negative window width or height");

786:   PetscNewLog(draw,&Xwin);
787:   PetscMemcpy(draw->ops,&DvOps,sizeof(DvOps));
788:   draw->data = (void*)Xwin;

790:   PetscDrawXiInit(Xwin,draw->display);
791:   if (!dvirtual) {
792:     Xwin->x = x; Xwin->y = y;
793:     Xwin->w = w; Xwin->h = h;
794:     if (!rank) {PetscDrawXiQuickWindow(Xwin,draw->title,x,y,w,h);}
795:     MPI_Bcast(&Xwin->win,1,MPI_UNSIGNED_LONG,0,PetscObjectComm((PetscObject)draw));
796:     if (rank) {PetscDrawXiQuickWindowFromWindow(Xwin,Xwin->win);}
797:   } else {
798:     Xwin->x = 0; Xwin->y = 0;
799:     Xwin->w = w; Xwin->h = h;
800:     PetscDrawXiColormap(Xwin);
801:     if (!rank) {PetscDrawXiQuickPixmap(Xwin);}
802:     MPI_Bcast(&Xwin->drw,1,MPI_UNSIGNED_LONG,0,PetscObjectComm((PetscObject)draw));
803:   }
804:   PetscDrawXiGetGeometry(Xwin,&Xwin->x,&Xwin->y,&Xwin->w,&Xwin->h);
805:   draw->x = Xwin->x; draw->y = Xwin->y;
806:   draw->w = Xwin->w; draw->h = Xwin->h;

808:   PetscOptionsGetBool(((PetscObject)draw)->options,((PetscObject)draw)->prefix,"-draw_double_buffer",&doublebuffer,NULL);
809:   if (doublebuffer) {PetscDrawSetDoubleBuffer(draw);}
810:   return(0);
811: }